Circuit/System Testing

Procedure 1

This diagnostic detects invalid serial data from another module which causes the EBCM to deactivate ABS, traction control and the vehicle stability enhancement system.

1. Verify that no DTCs are set in the ECM, IPM or the TCM.
   • If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
2. Use the scan tool Enhanced Diagnostics Data screen to determine which module is transmitting the invalid signal.
3. The module that is transmitting the invalid data should not have any DTCs set.
   • If the module has a DTC set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

Procedure 2

This diagnostic detects invalid serial data from the IPM to the EBCM regarding the traction control switch or the circuit.

1. Verify that DTC C0561 71 CB is not set.
   • If DTC is set, refer to Traction Control/Stability Control Indicator Malfunction  for traction control switch (TCS) diagnosis.
2. If no DTCs are set, refer to Symptoms - Antilock Brake System .

Procedure 3

This diagnostic detects invalid serial data from the IPM to the EBCM regarding the cruise control sensor or circuit.

1. Verify that DTC B3794, C1002, P0571, P0572, P0573, P0575 or P0703 is not set.
   • If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
2. If no DTCs are set, refer to Symptoms - Cruise Control .

Procedure 4

This diagnostic detects invalid serial data from the IPM to the EBCM regarding the brake pedal position sensor or circuit.

1. Verify that DTC C0277 or DTC C0278 is not set.
   • If DTC is set, refer to DTC C0277 , or DTC C0278 for brake pedal position sensor diagnosis.
2. If no DTCs are set, refer to Symptoms - Lighting .

Procedure 5

This diagnostic detects invalid serial data from ECM module which causes the EBCM to deactivate ABS, traction control and the vehicle stability enhancement system.

Verify that no DTCs are set in the ECM.

• If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .